Everything in ubuntu has different date-time formats. It is crazy. Is there a way to set the standard ISO date-time format (e.g., 2014-05-03T12:31) universally throughout ubuntu so that the ISO format overrides EVERYTHING?

I currently have my locale set to an ISO standard (i.e., en_DK) but it is next to useless because few things obeys it. Terminal/Bash doesn't obey it. Nautilus doesn't obey it. the watch-command doesn't obey it.